Reduce Tx WiFi power

ChingMing · March 19, 2020, 8:18am

I have not found a way to reduce WiFi power on an ESP32 with Mongoose OS.
Would you please tell me how to reduce WiFi power.

Thanks.

nliviu · March 20, 2020, 6:08am

You can use esp-idf function esp_wifi_set_max_tx_power

github.com

mongoose-os/esp-idf/blob/1df48e5f4765ecf40337364bce54b0580d8afc0a/components/esp32/include/esp_wifi.h#L884-L895


/**
  * @brief     Set maximum WiFi transmitting power
  *
  * @param     power  Maximum WiFi transmitting power, unit is 0.25dBm, range is [40, 82] corresponding to 10dBm - 20.5dBm here.
  *
  * @return
  *    - ESP_OK: succeed
  *    - ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init
  *    - ESP_ERR_WIFI_NOT_START: WiFi is not started by esp_wifi_start
  *    - ESP_ERR_WIFI_NOT_ARG: invalid argument
  */
esp_err_t esp_wifi_set_max_tx_power(int8_t power);